19fa89e938
given in random(4). This includes updating of the relevant man pages, and no-longer-used harvesting parameters. Ensure that the pseudo-unit-test still does something useful, now also with the "other" algorithm instead of Yarrow. PR: 230870 Reviewed by: cem Approved by: so(delphij,gtetlow) Approved by: re(marius) Differential Revision: https://reviews.freebsd.org/D16898
135 lines
3.6 KiB
C
135 lines
3.6 KiB
C
/*-
|
|
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
|
|
*
|
|
* Copyright (c) 2010 Juli Mallett <jmallett@FreeBSD.org>
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#include <sys/param.h>
|
|
#include <sys/systm.h>
|
|
#include <sys/bus.h>
|
|
#include <sys/clock.h>
|
|
#include <sys/kernel.h>
|
|
#include <sys/lock.h>
|
|
#include <sys/module.h>
|
|
#include <sys/random.h>
|
|
|
|
#include <contrib/octeon-sdk/cvmx.h>
|
|
#include <contrib/octeon-sdk/cvmx-rng.h>
|
|
|
|
#define OCTEON_RND_WORDS 2
|
|
|
|
struct octeon_rnd_softc {
|
|
uint64_t sc_entropy[OCTEON_RND_WORDS];
|
|
struct callout sc_callout;
|
|
};
|
|
|
|
static void octeon_rnd_identify(driver_t *drv, device_t parent);
|
|
static int octeon_rnd_attach(device_t dev);
|
|
static int octeon_rnd_probe(device_t dev);
|
|
static int octeon_rnd_detach(device_t dev);
|
|
|
|
static void octeon_rnd_harvest(void *);
|
|
|
|
static device_method_t octeon_rnd_methods[] = {
|
|
/* Device interface */
|
|
DEVMETHOD(device_identify, octeon_rnd_identify),
|
|
DEVMETHOD(device_probe, octeon_rnd_probe),
|
|
DEVMETHOD(device_attach, octeon_rnd_attach),
|
|
DEVMETHOD(device_detach, octeon_rnd_detach),
|
|
|
|
{ 0, 0 }
|
|
};
|
|
|
|
static driver_t octeon_rnd_driver = {
|
|
"rnd",
|
|
octeon_rnd_methods,
|
|
sizeof (struct octeon_rnd_softc)
|
|
};
|
|
static devclass_t octeon_rnd_devclass;
|
|
DRIVER_MODULE(rnd, nexus, octeon_rnd_driver, octeon_rnd_devclass, 0, 0);
|
|
|
|
static void
|
|
octeon_rnd_identify(driver_t *drv, device_t parent)
|
|
{
|
|
BUS_ADD_CHILD(parent, 0, "rnd", 0);
|
|
}
|
|
|
|
static int
|
|
octeon_rnd_probe(device_t dev)
|
|
{
|
|
if (device_get_unit(dev) != 0)
|
|
return (ENXIO);
|
|
|
|
device_set_desc(dev, "Cavium Octeon Random Number Generator");
|
|
return (BUS_PROBE_NOWILDCARD);
|
|
}
|
|
|
|
static int
|
|
octeon_rnd_attach(device_t dev)
|
|
{
|
|
struct octeon_rnd_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
callout_init(&sc->sc_callout, 1);
|
|
callout_reset(&sc->sc_callout, hz * 5, octeon_rnd_harvest, sc);
|
|
|
|
cvmx_rng_enable();
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
octeon_rnd_detach(device_t dev)
|
|
{
|
|
struct octeon_rnd_softc *sc;
|
|
|
|
sc = device_get_softc(dev);
|
|
|
|
callout_stop(&sc->sc_callout);
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
octeon_rnd_harvest(void *arg)
|
|
{
|
|
struct octeon_rnd_softc *sc;
|
|
unsigned i;
|
|
|
|
sc = arg;
|
|
|
|
for (i = 0; i < OCTEON_RND_WORDS; i++)
|
|
sc->sc_entropy[i] = cvmx_rng_get_random64();
|
|
/* MarkM: FIX!! Check that this does not swamp the harvester! */
|
|
random_harvest_queue(sc->sc_entropy, sizeof sc->sc_entropy, RANDOM_PURE_OCTEON);
|
|
|
|
callout_reset(&sc->sc_callout, hz * 5, octeon_rnd_harvest, sc);
|
|
}
|